A044198 Numbers n such that string 1,3 occurs in the base 8 representation of n but not of n-1.

11, 75, 88, 139, 203, 267, 331, 395, 459, 523, 587, 600, 651, 704, 779, 843, 907, 971, 1035, 1099, 1112, 1163, 1227, 1291, 1355, 1419, 1483, 1547, 1611, 1624, 1675, 1739, 1803, 1867, 1931, 1995, 2059, 2123, 2136, 2187, 2251, 2315, 2379, 2443, 2507, 2571, 2635, 2648, 2699

Offset

1,1

Links

Paolo Xausa, Table of n, a(n) for n = 1..10000

Mathematica

A044198Q[k_] := StringContainsQ[IntegerString[k, 8], "13"] && StringFreeQ[IntegerString[k - 1, 8], "13"];
Select[Range[5000], A044198Q] (* Paolo Xausa, Sep 08 2025 *)

Crossrefs

Cf. A007094.

Sequence in context: A003367 A121784 A213165 * A044579 A231917 A289419

Adjacent sequences: A044195 A044196 A044197 * A044199 A044200 A044201

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Sep 08 2025

Status

approved